These crossovers are completely contained within themselves. They are not part of any bigger continuity–yet.
Ghostbuster meets Casper
Dr. Raymond Stantz, played by Dan Aykroyd, from Ghostbusters appeared on Casper. Ghostbusters spun off Ghostbusters II. Casper spun off two prequels: Casper: A Spirited Beginning and Casper Meets Wendy.
Before Babylon 5 spun off six television films and Crusade, in the episode "There All Honor Lies", Captain John Sheridan is presented with a teddy bear which is supposed to be a representation of him. He disapproves and throws it out of an airlock. The teddy bear ends up on Space Cases "Who Goes Where".
Terminator in the Abyss
The TV anchorman from The Terminator, played by Joe Farago, appeared in The Abyss. The Benthic Petroleum company from The Abyss appeared in Terminator 2: Judgment Day. Terminator 2: Judgment Day is followed by three more films and Terminator: The Sarah Connor Chronicles televsion series.
Isador "Machete" Cortez, played by Danny Trejo, first appeared in the Spy Kids franchise before being given his own Machete franchise.
Very small continuities
- Randolph and Mortimer Duke from Trading Places appeared on Coming to America.
- Stanley Anderson played the President in The Rock and Armageddon; both were directed by Michael Bay.
Series with two or more colors were on multiple networks. The main color is the series last network.